Sons of Leda
The protectors of sailors
Were worshiped as the great Twin Brethren to whom all Dorians pray.
The brothers spent half of their time on Olympus and half in the underworld after Castor had died because they could bare to be apart.
Considered great warriors.
The patron gods of horses and of the Roman social order of mounted knights.
Castor is mortal while Pollux (Polydeuces) was immortal.

Castor and Pollux